Reamer Bits

When completing high-performance projects that require the forming of precise holes in or through materials, the sides of the hole may require additional work to ensure they are completely smooth. In this case, reamers are designed to completely smooth the hole to a high degree of accuracy.


Due to the removal of the uneven material, reaming will slightly enlarge the hole you have created, therefore making it advisable to form the initial hole fractionally smaller to allow for the reaming space – this is called the allowance. It is recommended that the drilled hole should not be enlarged by more than 5% of the drilled diameter.


Typically made from carbide or high-speed steel (HSS), these multi-edged rotary cutting tools are used in metalworking for enlarging and finishing holes to a high level of precision and accuracy.


What types of reamer are there?


At RS Components, we have both machine reamer bits and hand reamer bits. The main difference between the two is that hand reamer bits have a longer taper or lead in at the front end of the bit, which compensates for the difficulty of using hand power alone.


Straight reamer bits are used to make only minor enlargements to holes, typically ones used for the force-fitting of location dowel pins or for unthreaded shoulder bolts.


With helical/spiralled reamer bits, a clockwise reamer will pull any debris up and out of a blind hole, whereas an anti-clockwise reamer will push debris forward, which can be helpful when creating a through-hole.


A tapered reamer is used to make a tapered hole for a tapered pin, which is a self-tightening device due to the shallow angle of the taper. They are commonly used in aircraft assembly and may only be re-reamed a small number of times during an aircraft’s career.


Combination reamers have two or more cutting surfaces, cut to resemble the part’s multiple internal diameters. Using combination reamers reduces the number of separate operations as well as precisely creating relative depths and diameters.


Adjustable reamers consist of several blades along a tapered groove that can be adjusted to cover a small range of hole sizes. They are restricted to light usage due to the absence of any spiral in the flute, meaning they will only remove minimal material for each diameter setting, and cannot be used in holes that have an axial split.


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Omschrijving Prijs Shank Type Diameter Overall Length Material
RS-stocknr. 394-251
FabrikantRS PRO
70,67 €
Each
Aantal stuks
Straight 9.25 → 10mm 115 mm HSS
RS-stocknr. 698-174
FabrikantnummerB101 14MM
FabrikantDormer
28,98 €
Each
Aantal stuks
Morse Taper 14mm 161 mm HSS
RS-stocknr. 394-302
FabrikantRS PRO
122,15 €
Each
Aantal stuks
Straight 19 → 21mm 180 mm HSS
RS-stocknr. 698-203
FabrikantnummerB101 19MM
FabrikantDormer
51,32 €
Each
Aantal stuks
Morse Taper 19mm 193 mm HSS
RS-stocknr. 698-146
FabrikantnummerB101 10MM
FabrikantDormer
24,58 €
Each
Aantal stuks
Morse Taper 10mm 146 mm HSS
RS-stocknr. 394-267
FabrikantRS PRO
65,57 €
Each
Aantal stuks
Straight 10 → 10.75mm 125 mm HSS
RS-stocknr. 698-152
FabrikantnummerB101 12MM
FabrikantDormer
26,40 €
Each
Aantal stuks
Morse Taper 12mm 156 mm HSS
RS-stocknr. 394-285
FabrikantRS PRO
88,32 €
Each
Aantal stuks
Straight 13.75 → 15.25mm 150 mm HSS
RS-stocknr. 224-4448
FabrikantnummerB901 2.0MM
FabrikantDormer
29,32 €
Each
Aantal stuks
Straight 2mm 50 mm HSS
RS-stocknr. 224-4505
FabrikantnummerB901 10.0MM
FabrikantDormer
30,12 €
Each
Aantal stuks
Straight 10mm 133 mm HSS
RS-stocknr. 698-219
FabrikantnummerB101 20MM
FabrikantDormer
51,87 €
Each
Aantal stuks
Morse Taper 20mm 200 mm HSS
RS-stocknr. 188-2505
FabrikantRS PRO
69,64 €
Each
Aantal stuks
Morse Taper 22mm 184 mm HSS
RS-stocknr. 394-273
FabrikantRS PRO
54,25 €
Each
Aantal stuks
Straight 7 → 7.75mm 90 mm HSS
RS-stocknr. 188-2506
FabrikantRS PRO
75,10 €
Each
Aantal stuks
Morse Taper 26mm 184 mm HSS
RS-stocknr. 224-4454
FabrikantnummerB901 3.0MM
FabrikantDormer
23,32 €
Each
Aantal stuks
Straight 3mm 62 mm HSS
RS-stocknr. 188-2477
FabrikantRS PRO
96,22 €
1 Set
Set(s)
Straight 14 mm, 18 mm, 22 mm 105 mm HSS
RS-stocknr. 394-279
FabrikantRS PRO
76,06 €
Each
Aantal stuks
Straight 11.75 → 12.75mm 130 mm HSS
RS-stocknr. 394-239
FabrikantRS PRO
141,70 €
Each
Aantal stuks
Straight 21 → 23mm 85.72 mm HSS
RS-stocknr. 698-023
FabrikantnummerB101 1/2
FabrikantDormer
26,36 €
Each
Aantal stuks
Morse Taper 1/2in 156 mm HSS
RS-stocknr. 188-2509
FabrikantRS PRO
75,10 €
Each
Aantal stuks
Morse Taper 1in 7-1/4 in HSS